Table 3.

Baseline characteristics and daily metformin dose of three categories according to baseline hemoglobin A1c level

Values are presented as median (low quartile, high quartile), mean±standard deviation, or number (%). Analysis of variance test was used for parametric analysis and Kruskal-Wallis test for nonparametric analysis.

BMI, body mass index; HbA1c, hemoglobin A1c; HOMA-β, homeostasis model assessment of β-cell function; HOMA-IR, homeostasis model assessment of insulin resistance.

^aStatistical significance (P<0.017) in post hoc analysis (Mann-Whitney test with Bonferroni correction) was indicated by category I vs. III, ^bCategory II vs. III, ^cCategory I vs. II.